AASTRA Office 10 User manual - Manual (Page 17)

Personalizing Your Phone
17
Personalizing Your Phone
Basic Settings
This section explains how to adapt the phone's basic settings to suit your personal requirements.
Setting the Volume during a Call
You want to adjust the volume while in a call.
The new volume will remain stored even after the call is ended.
<long> To reduce the volume: Press digit key 1 and hold it down a moment.
– or –
<long> To increase the volume: Press digit key 2 and hold it down a moment.